It is a slight annoyance to me when written posts or media strip foreign names of diacritics (for obvious reasons it annoys me for Polish specifically). It happens a surprising amount.
Those little dots and lines and squiggles and whatnot are not there for decoration. They're part of the word, they mean shit. I am not asking you to pronounce these, but write them out. Everything online is in Unicode, it's not a huge ask.
Your keyboard doesn't allow these characters to be typed in? So what, it's literally a matter of copy pasting that letter into your text. MS Office and OpenOffice have those characters available, and there are actual websites for lists of Unicode characters, complete with a "Copy to clipboard" button on screen.
You can spare the extra 15 seconds. I'm not asking you to write in the ancient tongue of R'lyeh there.